2008 test · Question 78 of 100 ★ 65/20
Name one war fought by the United States in the 1900s.
Official USCIS answers
- World War I
- World War II
- Korean War
- Vietnam War
- (Persian) Gulf War
Why this is the answer
The 1900s means the years 1900 to 1999. The United States fought in World War I, World War II, the Korean War, the Vietnam War, and the Gulf War during that century. These are the wars listed in the official answers.
💡 Memory tip: Remember 'W-W-K-V-G': World Wars, Korea, Vietnam, Gulf — all in the 1900s.
This is the 2008 test, for N-400s filed before October 20, 2025. Filed on or after that date? Use the 2025 test.
More from Recent American History and Other Important Historical Information
- 79. Who was President during World War I?
- 80. Who was President during the Great Depression and World War II?
- 81. Who did the United States fight in World War II?
- 82. Before he was President, Eisenhower was a general. What war was he in?
- 83. During the Cold War, what was the main concern of the United States?
- 84. What movement tried to end racial discrimination?
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Source: USCIS, Civics (History and Government) Questions for the Naturalization Test (rev. 01/19).